The dope-tainted trio of Sini Jose,Juana Murmu and Tiana Mary Thomas face a possible two-year ban as their confirmatory 'B' sample tests also returned positive for anabolic steroids today. The trio tested their 'B' samples at the National Dope Testing Laboratory on Monday and the results confirmed they had flunked the test. Sini and Juana have tested positive for methandionone while Mary Thomas had anabolic steroid epimethandiol in her urine sample. The samples were collected during the June 11-14 National Inter-State Meet in Bangalore. Sini,Jauna and Mary Thomas' 'B' samples have also tested positive for anabolic steroids. Under procedure,they will now appear before a NADA disciplinary panel and if found guilty,their maximum punishment would be a two-year ban as it would be their first dope offence, a NADA source told PTI. All of them had pleaded innocence,saying the vitamin supplements they took while training could have been contaminated. Sini was one of the members of the women's 4x400m relay quartet that won gold in the Commonwealth and Asian Games last year. Juana finished fourth in the 400m hurdles in the Asian Games. Mary Thomas was a member of the gold-winning 4x400m relay team in the South Asian Federation Games in Dhaka last year.